GRX Di2 1x12 rear mech
Shimano GRX RD-RX827 Di2 1x12 Rear Derailleur
Shimano's fully wireless 1x12 GRX Di2 rear mech, with its own removable battery and a 10-51T range for big-mountain gravel. It borrows the tough Shadow ES design and auto impact recovery from Shimano's latest wireless MTB mechs.
Highlights
Why we rate it
Truly wireless
A removable BT-DN320 battery sits inside the mech, so there are no wires to the frame at all.
Recovers from knocks
Automatic Impact Recovery moves the mech back into position by itself after a strike.
Shadow ES chain control
A slimmer, stronger take on the clutch keeps the chain tight and quiet over rough ground.
Huge range
Works with Shimano's 10-51T Microspline cassettes for very low climbing gears on a single ring.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Model code
- RD-RX827-SGS
- Speeds
- 12
- Actuation
- Di2 (fully wireless, battery in mech)
- Drivetrain
- 1x
- Cassette
- 10-51T (Microspline)
- Cage
- SGS long
- Pulleys
- 13T
- Battery
- BT-DN320 (sold separately)
- Clutch
- Shimano Shadow ES
- Weight
- 449g (claimed, excl. battery)
- Compatible levers
- ST-RX825 (wireless)
Ordering
Available from The Cycle Collective
Available to order through The Cycle Collective in Dorking. For availability, setup or advice, call 0203 148 6764 or email hello@thecyclecollective.cc.